650 Feeds and speeds

IBM 407 Accounting Machine

• Models available

     Model Al or Model A2 for use either with 650 or for independent operation

IBM 407 Accounting Machine

• Models available

     Model Al or Model A2 for use either with 650 or for independent operation

• Speed

     150 cards-per-minute input, maximum
     150 lines-per-minute output, maximum
     120 alpha-numerical characters per line

Summary Punch

     IBM 514, 519 and 523 Summary Punches can be used with the 407 when the 407 is attached to the 650

IBM 533 Read-Punch Unit

• Speed

     200 cards-per-minute input, maximum
     100 cards-per-minute output, maximum

• Standard features

     10 pilot selectors
     8 co-selectors
     1 read-digit selector
     1 punch-digit selector
     20 positions double punch and blank-column detection
     4 positions punch delay

• Optional features

     10 pilot selectors
     8 co-selectors
     1 read-digit selector or 1 read half-time emitter
     1 punch-digit selector or 1 punch half-time emitter
     60 positions double punch and blank-column detection
     1 offset stacker
     10 read-code and punch-code selectors

IBM 650 Console Unit

     Central processing unit for all input-output combinations. Houses magnetic drum storage, arithmetical device, operator's console

IBM 652 Control Unit

     Controls operation of magnetic tape units

IBM 653 Auxiliary Unit

     Integral component of tape processing combinations, available separately as high speed "working" storage to increase 650 processing speeds

• Type of storage

     High-speed magnetic cores

• Capacity

     600 digits (60 words)

IBM 655 Power Unit

     Houses 650 power supply, translating circuitry

IBM 727 Magnetic Tape Unit

• Tape characteristics

• Lengths

     a) Acetate 2,400 feet
     b) Mylar 200 and 600 feet

• Density

     200 characters per inch

• Speed

     Reading: 75 inches per second
     Writing: 75 inches per second
     Rewinding: 500 inches per second

• Record length

     10 to 600 digits (1 to 60 words)

For incorporation with all 650 combinations as required

Alphabetic Device

• Input-Output capacity

     Thirty positions distributed in the first 6 storage-entry and storage-exit words

• Characters handled

     All 26 alphabetic characters plus the 10 numerical digits

Special Character Device

• Input-Output capacity

     Same as alphabetic device

• Characters handled

     Group I: eleven and twelve punch characters
     Group II: all 407 special characters, including eleven and twelve punches

Floating-Point arithmetic

• Function

     Provides individual operation codes for automatic processing of floating decimal arithmetic

• Approximate calculating speeds (optimally programmed)

     35,300 floating additions or subtractions per minute (4 shifts)
     6,000 floating multiplications per minute (multiplier = 55,555,555)
     3,800 floating divisions per minute (divisor = 55,555,555)

Indexing Accumulators

• Function

     Provide for data address and instruction address modification. Reduce instruction storage requirements

• Capacity

     Three 4-position accumulators